Wobbler or flexible mounting for stuffing boxes



May 4, 1943. I R. w. SK iNNR ET AL i 2,318,428

WOBBLER 0R FLEXIBLE MOUNTING FOR STUFFING BOXES Filed Oct. 28, 1940 2 Sheets-Sheet l INVENTORS Rgymmnd W. Skinner Percival ELEkinTLE-P ATTORNEYS.

y 1943. R. w. SKINNER ET AL 2,318,428

WOBBLEB OR FLEXIBLE MOUNTING FOR STUFFING BOXES Filed Oct. 28, 1940 2 Sheets-Sheet 2 FIG. 2.

INVENTORS.

Raymond. W. Skinner Percival Elikirmar ATTORNEYS.

Patented May 4, 1943 UNETED Sf'rsres eA'rsNT OFFICE WOBBLER ORFLEXIBLE MOUN TIN G FOR w STUFFING BOXES Raymond 'W. Skinner and Percival B. Skinner,

' Tulsa, Okla.

Application October. 28, 1940, Serial No. 363,228 2 Claims. (01. 285-90) This invention relates to improvements in oil well pumping equipment.

The primary object of this invention is the provision of an improved stufiing box for oil wells having a Wobbler associated therewith so as to permit the pump or polish rod to rock in its slight axial movement, as is the case with conventional pumping jacks, without impairing the efiiciency of the equipment, and particularly the packing of the stufiing box.

A further object of this invention is the provision of an improved Wobbler for oil well pumping equipment adapted to fit between the oil well casing and conventional pump jack stuffing box, which is of a very compact nature so as not to impair the operating efficiency of any of the conventional parts of pumping equipment, and which is of a construction to withstand high pumping pressures.

Other objects and advantages of this invention will be apparent during the course of the following detailed description.

In the accompanying drawings, forming a part of this specification, and wherein similar reference characters designate corresponding parts thrucut the several views,

Figure 1 is a perspective view of the improved Wobbler.

Figure 2 is a side elevation of a conventional pumping jack stuffing box showing in cross section the improved Wobbler associated therewith upon the well casing.

Figure 3 is a cross sectional view taken thru the improved Wobbler substantially on the line 3-3 of Figure 2.

In the drawings, wherein for the purpose of illustration is shown only a preferred embodiment of the invention, the letter A may generally designate a conventional stuffing box such as is used for the polish or pump rods of a conventional pumping jack The oil well casing B receives the pump or polish rod therein, and between the casing and the stufling box is adapted to be positioned the improved Wobbler D.

It is well known to those skilled in this art that polish and pumping rods of oil well pumping equipment adjacent to the stufiing box will not move in a true axial line. This is caused by the motion of the walking beam. To compensate for this eccentricity and to avoid the many complications resulting therefrom, we have provided a wobbling block which will not interfere with application upon conventional equipment, due to the fact that it is so very compact. Furthermore, the device is of a nature which is wear resistant and will withstand high pumping pressures.

In the preferred form of the invention the Wobbler includes a casing construction l0 consisting of a well casing attaching portion H and a complementary portion 12. The casing portions i l and I2 have annular walls; the annular wall of the portion H having external screw threads l5 to receive the internal screw threads of the annular wall of the portion l2; Furthermore, these portions]! and I2 have end walls ll and 18 respectively. End wall I! is provided with an internally screw threaded collar 25 adapted to receive the upper screw threaded end of the well casing B therein. An inwardly convergent opening 23 is provided in the wall it). This construction of the casing lt'provides a ring-shaped device-and defines a chamber in the casing, adapted to receive packing rings 30 and 3| resting respectively against the inside surfaces of the walls I! and l8., They may be formed of solid rubber or neoprene.

The Wobbler furthermore includes a sleeve portion 55, which in the form shown in the drawings, is separate from the casing of the stuffing box. However, we want it to be understood that this sleeve portion may be an integral part of the stufing box casing. In the form shown, the sleeve 59 is provided with internal screw threads 5| to detachably receive the screw thread 52 upon the casing of the stufiing box A. The sleeve is of a size to fit freely thru the opening 23 of the casing portion [2 and it depends into the casing chamber so that the end edge 54 may terminate short of the inside surface of the Wall II. It is externally provided with an annular flange 55, the outer periphery of which terminates short of the inner peripheral surface of the casing I0, as shown in Figure 2. The flange 55 is spaced about midway between the inside surfaces of the end walls I1 and I8 and overlaps appreciably said end walls, so that it would be impossible to withdraw the sleeve 59 from the casing Ill. The packing rings 30 and 3| rest in compression between the end wall I1 and flange 55, and wall I8 and flange 55 respectively, and said compression rings engage in fiuidtight relation against the exterior of the sleeve 50 and the interior of the annular wall of the easing portion 1 l.

The rings 3% and 3| are circular in cross section, except for annular stub portions on the inner and external circumference thereof, which engage respectively against the exterior surface of the sleeve 50 and the interior surface of the annular wall of casing I l The operation of the improved Wobbler will be apparent to any one skilled in the art, from the foregoing description. It is to be understood that instead of the well casing B, a conventional pumping T base may be attached to the lower portion of the wobbler casing.

The casing portions H and 12 are provided with wrench engaging lugs 60 and BI respectively thereon.

Various changes in the shape, size and arrangement of parts may be made to the form of invention herein shown and described, without departing from the spirit of the invention or the scope of the claims.

We claim:

1. In a Wobbler for well pumping jacks and the like, the combination of a metallic casing comprising a pair of relatively detachable parts, each of said parts including an annular wall and an end wall, said annular walls of the parts being detachably screw threaded together to relative- 1y space the end walls of said parts to define a chamber therebetween, one of said parts having a screw threaded opening therein to detachably receive an end of a well casing, and the other of said parts having an opening therein, a metallic sleeve loosely extending into said last opening and within the chamber being provided with an external annular flange normally overlapping the end walls of said casing, said sleeve having a portion extending externally of said casing and being provided with means for detachably connecting a pump jack stufling box thereto, and individual flexible packing members within the chamber of said casing having normally convex surfaces engaging in sealing contact with the a screw threaded opening therein for detachable connection of a well casing thereto, the other of the parts having an opening therein larger than V the opening in the lower end wall, a metallic sleeve loosely extended into the opening of the upper end wall and being of a diameter greater than the opening in the lower wall and at its lower end terminating short of the inner surface of said lower wall, said metallic sleeve being provided with an external annular flange overlapping beyond the openings in the end wall and terminating shortin closely spaced relation at its outer periphery with respect to the inner surface of said chamber, said sleeve projecting externally of said chamber and having means on the top thereof for detachable connection of a pump jack stufling box thereto, and flexible packing means in the chamber of the casing engaging said flange at both sides thereof and the inner surfaces of said end walls and the facin surfaces of said sleeve and chamber and holding said metallic sleeve in supported relation by said casing.

RAYMOND W. SKINNER. PERCIVAL B. SKINNER. 

